Bunk for logging-cars.



C. W. RUSSELL. BUNK FOR LOGGING CARS. APPLICATION FILED rmm, 1914.

1,124,530, Patentd Jan.12,1915.

2 SHEETS-SHEET 1.

WITNESSES." INVENTOR X 5 2 WEVJSZZZ I BY v MW W F Wm CLINTON W. RUSSELL, OF DETROIT, lVIICI-IIGAN.

BUNK FOR LOGGING-CARS.

menses.

Specification of Letters Patent.

Application filed February 2, 1914. Serial No. 816,025.

To all 107mm it may concern:

Be it known that I, CLINTON W. RUSSELL, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Bunks for Logging-Cars, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to bunks for logging cars, and has more particular reference to the construction of a collapsible end stake and mechanism for supporting the same.

In the drawings: Figure l is a perspective view of the bunk; Fig. 2 is a longitudinal section through one end of the bunk showing the stake in its locked position; Fig. 3 is a similar view showing the collapsed position of the stake; Fig. 4- is a cross section; and Fig. 5 is a sectional plan view of the latch mechanism.

In the hauling of large and heavy timber, the logs are supported upon bunks on independent trucks, and are held from rolling off these bunks by chocks or end stakes. To permit of loading and unloading, at least one of the chocks or end stakes must be removed or depressed, while in normal posi tion these parts are subjected to veryheavy stresses. Furthermore, when the chock or stake is to be released it is frequently under load and the releasing mechanism must therefore be operable under such load.

My improved construction is designed to obtain a bunk having an end stake which may be readily released even where under the load of the log, and. further, one in which the stake is elfectively braced in its'normal position so as to be able to withstand any load to which it may be subjected.

A is a bunk of any suitable construction, but is shown formed of a modified I-beam, havinga head portion 13 01" spear-shaped cross section. The ends C are bifurcated to receive the stake D, which is preferably constructed as follows: E are oppositely-projecting lugs or trunnions at the base of the stake D, which engage segmental, grooved bearings F in the furcations of the end portion C. G is a chain passing through an eye H in the upper end of the stake and em tending downward in inclined direction to the opposite sides of the portion C, being secured at its ends by passing through an apertured lug I and having link-engaging locking members J adjacent thereto. The

trunnions E are movable in thesegmental grooves F to adjust the stake from a collapsed or depressed position, where its outer end is below the plane of the bunk, as shown in Fig. 3, to an upright position, as shown in Fig. 2. In the latter position the stake is normally held by a dog K pivoted between the furcations of the portion C and having a hook K which engages a lip or laterallyextending lock L on the inner side of the stake. 'lhe dog K has an inwardly and downwardly extending arm K which is adapted for engagement with a second dog or locking lever M, also between the furcations of the bunk. This lever M is pivoted upon a pin N, while the dog K is pivoted upon a pin 0, both extending laterally through the bunk.

With the construction as thus far described, when the dcg K has its hook K in engagement with the lip or lock L and its arm K in engagement with the lever M, the stake D will be supported in its normal upright position, as shown in Fig. 2. In this position the chain G which connects with the upper end of the stake will be placed under tension whenever any lateral pressure of the log is exerted against the stake, and the only stress transmitted directly from the stake to the bunk is the downward thrust which is resisted by the hook K engaging the lip L. When, however, this hook is withdrawn the stake is free to drop, the trunnions E, passing around the segmental slots and the chains swinging into the position shown in Fig. 3. To disengage the hook K from the lip L the lever M must be withdrawn from the arm K to permit the latter to swing around the pivot O. The engagement. between the arm K and the lever M, as shown in Fig. 2, is such that there is no tendency to unlock, due to the stress exerted through the dcg K, but to hold this lever from accidental disengagement as well as to provide a means for releasing it when desired an actuating connection, is provided. This preferably consists of a rod P which'extends longitudinally of the bunk, being slidably supported in bearings formed in transverse webs Q, of the bunk and provided at one end with a laterally offset portion P which passes through a slot R in theend of the transverse web 0. S and S are handles secured to the rod P for rocking and moving the same longitudinally, andT is a keeper member pivoted Patented Jan. 12, 1915.

is the locking mechanism.

to the web of the bunkbeam,which maybe engaged with the handle S to prevent the accidental rocking of the same. The arrangement is such that when the handles S and S are in inclined position, as shown in Fig 1, the rod P may be slid longitudinally, and as the inner end of this rod has a hook P engaging the end of the lever M, the latter will be rocked so as to disengage the arm K of the deg K. On the other hand, when the handle 5 is rocked into vertical position, the laterally offset portion P of the rod P will engage with the web Q so as to lock it from longitudinal movement.

In operation, whenever the rod P is manipulated to disengage the lever M and release the drg K, the stake D will drop by gravity and assume the position shown in Fig. 3. In this position the log may be freely rolled on or off from the end of the bunk without interference from the stake. When the leg is loaded, by merely lifting the end of the stake D it may be raised to the position shown in Fig. 2, and in so doing a portion of the stake bearing against a lug K on the deg K will rock the latter into a position where the arm K is engageable with the notch M in the lever M. The operator then adjusts the rod P through the handle S, which is'sufiiciently near in location to the stake D to be operable when the latter is raised, and thus the lever M is forced into engagement with the arm K and is locked by the offset portion P of the rod P engaging the web Q. The latch T is then dropped over the handle S which will preclude any possibility of the shaking loose of \Vhen the lock is to be released, the operator, standing at the opposite end of the bunk, can disengage the latch T, rock the handle S and longitudinally adjust the rod P, and thereby disengage the the deg K. The multiplication of the lever is so great that this movement may be ac complished with ease, even where the stake and chains G are under heavy stress due to the load of the leg. I, v v \Vhat I claim as my invention is,

1. The combination with a bunk, of an end stake therefor having its lower end provided with a segmental sliding engagement with said bunk, an inclined link connecting the'upper end of said stake with the bunk, and a removable support for the lower end of said stake when in its upright position. v

2. The combination with a bunk, of an end stake, an inclined link connecting the upper end of said stake with said bank, means for slidably engaging the lower end of said stake with a segmental portion of said bunk, permitting of the adjustment of the same and the inclined linkconnected thereto to a position below'the top of the lever M from the inner faces of bunk, and a removable support for said stake in its raised position. v

3. The combination with a hunk, of an end stake therefor, an inclined link connecting the upper end of said stake with said bunk, means for permanently slidably en. gaging the lower end of said stake with said bunk to permit of the adjustment of the same and the inclined link into a position below the upper edge of the bunk, a dog for supporting the in its upright position, and means for releasing said dcg operable from the opposite end of the bunk.

4. Thecombination with a bunk having a bifurcated end, of an end stake having its lower end provided with a segmental sliding engagement with the bifurcation of the bunk, an inclined link or brace connecting the upper end of said stake with said bunk,

a locking dog for supporting the lower end of said stake when in upright position, and means operable from the opposite end of the bunk for releasing said locking dog.

5. The combination with a bunk having a bifurcated end with segmental grooved bearings formed in the opposite furcations thereof, of a stake having trunnions at its lower end engaging said segmental, grooved bearings, an inclined brace connection between the upper end of said stake and said bunk, a dog between the furcations of said bunk forming a support for said stake in its upright position, a locking lever for said dog, and a rod extending longitudinally of said bunk for actuating said locking lever to release said dog and disengage the same from said stake.

6. The combination with a bunk having a bifurcated end, of a stake having its lower end slidably engaging the furcations of said bunk in the different positions of said stake, a chain connected with the upper end of said stake and extending in an inclined direction to said bunk and secured thereto, a dog between the furcations of said bunk for supporting the lower end of said stake in its upright position, and means extending longitudinally of said bunk for locking and for releasing said dog.

7. The combination with a bunk having a bifurcated end with segmental. grooves in I the fur-cations thereof, of astake having trunnions at its lower end slidably engaging said segmental groove, a chain connecting the upper end 0 said stake and inclining downward and inward on opposite sides thereof, anchoring connections for the lower ends of said chain upon said bunk, a rockable dog between the furcations of said bunk having a hooked engagement with a supporting bearing at the lower end of said stake, an arm projecting from said dog, a lever for engaging said arm to hold the same from rocking movelower end of said stake when ment, and a rod for actuating said lever extending longitudinally of said bunk.

8. The combination with a bunk having a bifurcated end and segmental, grooved bearin gs in the inner faces of the furcations thereof, oi a stake provided with trunnions at its lower end for engaging said segmental, grooved bearings, a chain connected with the upper end of said stake, extending downward therefrom in an inclined direction and having an anchoring connection with said bunk, a rockable dog between the furcations of said bunk having a hooked supporting engagement with the lower end of said stake, an arm extending inward and downward from said dog, a lever notched for engagement with said arm, a rod longitudinally, adjustably secured to said bunk and connected to said lever, and means for locking said rod from longitudinal movement.

9. The combination with a hunk, of an end stake having a collapsible engagement therewith, a dog for supporting said stake in its normal upright position, a locking lever for said dog, and a rod extending longitudinally of said bunk connected with said lever and having an oliset portion engageable with the cooperating bearing on said bunk by a rocking movement to lock said rod from longitudinal movement.

10. The combination with a bunk, of an end stake there-for, a chain connected with the upper end of said stake and extending in an inclined direction to said bunk, an apertured lug on said bunk for engaging said chain, a link-engaging locking member adjacent to said lug, and a removable support for the lower end of the stake.

11. The combination with a bunk, of an end stake therefor, an inclined link connection between the upper end of said stake and said bunk, a removable support for the lower end of said stake when in its upright position, and means permitting said lower end to move inwardly of the bunk when released from said support.

In testimony whereof I aliix my signature in presence of two witnesses.

CLINTON W. RUSSELL.

Witnesses:

DELBERT H. SPRAGG. JAMES F. S11UR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

